Roberto Bautista Agut put Spain 1-0 ahead in their Davis Cup final against Canada with an emotional victory over Felix Auger-Aliassime in Madrid.
Bautista Agut, making a surprise return to the team following the death of his father on Thursday, beat the 19-year-old 7-6 (7-3) 6-3.
He was in tears after the win while addressing the jubilant crowd.
Spain will seal victory if world number one Rafael Nadal beats Denis Shapovalov in the second singles rubber.
Canada are in their first final, while Spain are chasing a sixth title.
The final is a best-of-three tie, where a doubles rubber would decide the outcome if the teams are level after the two singles matches.